* {
    box-sizing: border-box;
}

html, body{
    font-family: Avenir, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.border {
    position: relative;
}

.border::after {
    position: absolute;
    content: '';
    height: 1px;
    width: 200%;
    transform: scale(0.5);
    bottom: 0;
    left: -50%;
    background-color: #ccc;
}